https://bz.apache.org/bugzilla/show_bug.cgi?id=58003
Bug ID: 58003
Summary: Official website give a wrong example
Product: Log4j
Version: 1.2.17
Hardware: Macintosh
Status: NEW
Severity: major
Priority: P2
Component: Site & Docs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
The first page of website give us an example to explain how log4j works.
import com.foo.Bar;
// Import log4j classes.
import org.apache.log4j.Logger;
import org.apache.log4j.BasicConfigurator;
public class MyApp {
// Define a static logger variable so that it references the
// Logger instance named "MyApp".
static Logger logger = Logger.getLogger(MyApp.class);
public static void main(String[] args) {
// Set up a simple configuration that logs on the console.
BasicConfigurator.configure();
logger.info("Entering application.");
Bar bar = new Bar();
bar.doIt();
logger.info("Exiting application.");
}
}
The issue is the line below:
static Logger logger = Logger.getLogger(MyApp.class);
The page said logger's name is "MyApp", if we set log4j.logger.com.foo=WARN
The debug log in Bar class would be disabled(that is right), and the info log
in MyApp class works as usual, because it is not a child of "com.foo".
But unfortunately if we use the method getLogger with the parameter MyApp.class
to get a logger, this logger's name is "com.foo.Bar.MyApp", not "MyApp".
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